The Universal Atlas of Phonetic Evolution
Back to Matrix [h] → [l] Edit this Data

[l]→[h]Certainty: 3/5Commonality: 2/5

Alveolar lateral approximant to Voiceless glottal fricative

The shift from the lateral approximant [l] to the glottal fricative [h] (or related glottal stop [ʔ]) is a debuccalization process in which the oral lateral loses its place of articulation and shifts to the glottis. This change is well-documented in the Polynesian language family, where Proto-Polynesian liquids underwent debuccalization as part of a broader consonant reduction, and is attested cross-linguistically as part of lenition chains in which liquids weaken toward the glottis.

Phonetic Effects

Debuccalization, Lenition, Liquid Weakening

Language Examples

Proto-Polynesian *l (lateral)→Hawaiian /l/ ~ /ʔ/ (with some *l > ʔ debuccalization)— In Hawaiian, both Proto-Polynesian *l and *r merged into /l/, but a subset of words show further debuccalization: PPn *l > Hawaiian /ʔ/ (glottal stop, the ʻokina). Pairs such as pūliki ~ pūʻiki ('embrace') demonstrate this alternation. Hawaiian underwent the most radical consonant reduction in the Polynesian family, with PPn *k, *l, *r all contributing to the glottal stop inventory. The l/ʔ alternation is documented in historical sources and Carter (1996).
Proto-Eastern Polynesian *l→/h/ in some environments— Rapa Nui, the easternmost Polynesian language, shows consonantal reduction parallel to Hawaiian. Some Proto-Eastern Polynesian *l forms have correspondences where the lateral weakened toward [h], consistent with the general Polynesian tendency toward debuccalization in the extremities of the expansion. Rapanui retains /h/ as a productive phoneme derived partly from original fricatives and sonorants.
/l/ in syllable coda (e.g., 'milk' [mɪlk])→[mɪhk] ~ [mɪʔk] in some West Coast Scots varieties— In some Scots and Scottish English dialects, particularly on the West Coast, non-word-final /l/ can debuccalize to [h] or [ʔ] in certain phonological environments, especially before velar consonants. This represents a parallel lenition process in which the lateral loses its alveolar contact and shifts to a glottal articulation.
Written Tibetan lh- clusters (voiceless lateral)→Lhasa Tibetan /lʰ/ → in some analyses /h/ in fast speech— Old Tibetan had voiceless lateral clusters (written lh-) that in some modern varieties developed toward aspirated or fricative realizations. Standard Lhasa Tibetan preserves /lʰ/ as a distinct phoneme but colloquial fast speech shows variable reduction toward [h] in certain environments, illustrating the typological propensity for voiceless laterals to debuccalize.

Related Transformations

More Germanic Shifts

Sources & References

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